The first major change you’ll notice when running elementary OS 6 is the brand-new installer, which also acts as a first-time setup wizard by letting you choose the default system language, time zone, and keyboard layout.
Then, you are prompted by a redesigned screen to select the Live mode, or to perform a clean or custom install. At the first glance, elementary OS 6 will look pretty much identical to the previous release, elementary OS 5. The light theme is enable by default and comes with various enhancements to be more pleasant to the eye, but elementary OS 6 also features a dark theme that looks really gorgeous.